Tire.



PATYENTEIQHAPB. 18, 19657" G. A. BRAGKELSBERG.

TIRE.

. APPLIOATIONPILED r213. .29, 1904.

2 SHEEfIfS-SHEET l.

No. 787,491v Q PATENTED APR. 18, 1905. U. A. BRACKELSBERG.

TIRE.

APPLIOATION FILED FEB 29 1904.

2 SHEETS-SHEET 2.

UNTTE D STATES PATENT Patented April 18, 1905.

TIRE.

SPECiFIC'ATION forming part of Letters Patent No. '?8'?,491, dated April 18, 1905. Application filed February 29, 1904- Serial No. 196,763.

To all whom it may concern.-

Be it known that I, CARL ADOLF BRAoKuLs- BERG, a subject of the German Emperor, residingat Dusseldorf, Germany, have invented new and useful Improvements in Tires, of which the following is a specification.

My invention relates to a yielding flexible tire inclosing and protecting the pneumatic tire of'a wheel from injury and preventinga sliding of the wheels on the ground, so frequently occurring with pneumatic tires.

My invention is illustrated on thedrawings therewith, in which Figure 1 shows a portion of my new tire;-

Fig. 2, a cross-section through the same on line AB, Fig. 1; and Fig. 3, a metal casingcovering the segments hereinafter described. Figs. 4 to 10 illustrate modifications herein described of the invention.

To a pair of parallel closed rings or rims consisting of links I, flexibly joined to each other by pivots (Z, there are attachedby means of curved levers or arms 6 also turnable on pivots 0, segments or shoes a; The links 6 thus form two endless chains arranged at opposite sides of the flexible tire it, while the shoes a engagethe tread of the tire. The result of this arrangemeutis a tire which although its outside surface is closed can be bent in the direction toward the center, the segments a; and levers a turning on their pivots d and e. The said segments consist each of a metal casing, as shown by Fig. 3, which may be filled 1 out by wood, india-rubber, paper, or any other material, or the said material may be secured and protected by a ferrule g, as shown by Fig. 10, which would particularly prohibit a sliding of the wheel, as the sharp edges of the ferrule would enter into the ground. The tread may be given any desired profile. The

, flexibility of the said segmental pieces a depends upon the shape of the liilks c, for the bending curve of the links I) is bound to certain limits and is somewhat exaggerated on the drawings. As the rims formed by the said links 6 are strained by the pressure of the pneumatic tire against the segmental pieces a, a yielding of the rims can only take place by overcoming the aggregate force exer ted against the said pieces (1, because a strong pieces are moving; but the construction shown rigid. For this reason I prefer to make the 5 said levers c of a flexible or elastic material or give them a form which permits them to yield independently of any movement of the said rims I). I accomplish this by the construction shown in Fig.4, where the segmentalpieces 6 a are connected by the broad bottom ends of the pieces awhile the upper end connects, them with the rims 6, so that when the latter should break the pieces a would still form 2.4,. closed hoop unable to go off. A slot f, provided in each upper end of the links 0, obviates a transfer of the movement of the pieces a toward the center of the wheel. 1 The pieces' can only be made to yield if not less than two by Fig. 5, Where the connection corresponds with that shown in Fig. 1, except that the upper end is slotted like in Fig. 4, permits each segmental piece a to move independently? As" in these constructions the levers or links c are sliding uponthe pneumatic tire and are apt to gradually wear out the latter, I provide an:

other form for the said links cviz., flat chains, as shown by Figs. 6, 7, and 8. In Figl 6 each segment a isconneeted by two such chains with the rim b,while in Fig. 7 each segment is smaller and connected with the said rim 6 by one chain only. The said chain connections will yield when the segments a move and will adapt themselves to the form of the pneumatic tire.

To obtain an uninterrupted continuous tread, a flexible hoop or band it may be inserted in the linkscand held by projecting parts i. t

The object of the aforesaid linked rims 6 being to permit the laying of the protective tire round any wheel, it may be replaced by. an ordinary felly.

What I claim as my invention, and desire to protect by LetterslFatent, is

1. On a wheel a yielding flexible tire consisting of two parallel closed rims composed of links jointed to each othepby pivots, and segmental pieces forx ning tliei}tnead of the ice wheel and being connected with the aforesaid ili'j'LS by pivoted on "red levers or links, subof two parallel closed rims composed jointed to each other by pivots, and mm-ita nieces forming the tread of the and being connected with the aforesaid 'voted eurved levers or links, slotted endsuhstantially as described and s set forth. nhi ation of aflexihle tire with a e .dless ellains'ai'ranged at opof, arms pivoted to the ehainpivoted to the arms and engagof the tire, and arms that yieldingly connect the chains to the shoes, substantially as specitied.

Signed by me at Dusseldorf, (urermany, this 1st day of February, 1904.

JARL ADOLF BRACKllhSlSElKG.

W itn esses WILUAM Essmmvem ERNST VOLGKERS. 

